The constrain matrix c dews, k@(- Py d(ws k) k M 12pkT3 where d(w,k) 奈描1,(:k)P M i2pk jwN2 Vt 2,L,Y Let B@蝌的ey(mhk=D=成2L, (過两科学大季 A Direct Numerical Imaging Method National University of Defense TechnologyA Direct Numerical Imaging Method The constrain matrix C 29 ( , ) ( ) ( , ) qd k k w w w - v v v v v d I P d % @ 1 1 2 2 N 2 2 2 N ( , ) , ( , ) . 1 M j t i k r i k r i k r j t e e e k k P e e - - ? - ? - ? - 轾 轾 犏 犏 犏 犏 犏 犏 犏 = 犏 奈犏 犏 犏 犏 犏 犏 犏 犏 犏 犏臌 犏臌 v V v v v v v V M v v v M M w p p p w d w w ( , ) ( , ) H P P 蝌 w w w k d d v v r v v R d d k k % % % @ 1 2 = [ , , , ] v v v D v v v L L 2 1 2 [ , , , , ] w w = v v v v v L qd L qd C v v v where Let